Insulating a home costs £2000 and saves £50 a year. What is the payback time?
40 years.
LT
Related Physics GCSE answers
All answers ▸Describe (both quanititavely and qualitiatively) the energy changes of a ball of mass 0.5kg, dropped from a height of 10m and left to bounce. Make use of the law of conservation of energy.
Explain how the evaporation of a liquid causes the temperature of the remaining liquid to decrease.
A simple circuit contains a battery rated at 12V, connected in series to a filament lamp with a resistance of 3 ohms. What current flows through the filament lamp?
N/A